In this article,the principle of AM(standard amplitude modulation)and 2FSK(binary frequency-shift keying)are first introduced.Then a technique of dual modulation combining AM and 2FSK is proposed for simultaneous audio and data wireless transmission.At th
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何婕,何小海,滕奇志,罗代升.一种AM调幅-2FSK调频通信系统的研究[J]. Journal of Terahertz Science and Electronic Information Technology ,2004,2(1):